"roots, k . "
heavy current applications level 4: / k.. roots - 1 ed. - usa : longman 1982. - ", 252p.; 21 cm." - longman technician series .
0 582 41219 6
electric engeneering
621. 3
heavy current applications level 4: / k.. roots - 1 ed. - usa : longman 1982. - ", 252p.; 21 cm." - longman technician series .
0 582 41219 6
electric engeneering
621. 3